A pendulum of length 200 cm is horizontal when its bob of mass 200 gm is released. It has 90% of initial energy when the bob reaches the lower most point. Speed of the bob at this point is -
Text Solution
Verified by ExpertsThe correct answer is:
D
v = 
when 100% energy gets converted.
But here 
mv 2 = 0.9 mgh
i.e. v = 
v = 
= 6 m/s
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